fix(es/minifier): Compress consecutive return statements properly (#9620)

**Description:**

Compress consecutive return statements properly.

**Related issue:**

 - Closes https://github.com/swc-project/swc/issues/9619

.changeset/famous-keys-shake.md

@@ -0,0 +1,6 @@
+---
+swc_core: patch
+swc_ecma_minifier: patch
+---
+
+fix: compress consecutive return statements properly

crates/swc_ecma_minifier/src/compress/optimize/if_return.rs

@@ -219,6 +219,16 @@ impl Optimizer<'_> {
                         }
                     },
 
+                    (
+                        Some(Stmt::Block(BlockStmt { stmts: s1, .. })),
+                        Some(Stmt::Block(BlockStmt { stmts: s2, .. })),
+                    ) if s1.iter().any(|s| matches!(s, Stmt::Return(..)))
+                        && s2.iter().any(|s| matches!(s, Stmt::Return(..))) =>
+                    {
+                        log_abort!("if_return: [x] Aborting because early return is observed");
+                        return;
+                    }
+
                     _ => {}
                 }
             }

crates/swc_ecma_minifier/tests/fixture/issues/9619/config.json

@@ -0,0 +1,47 @@
+  {
+  "arguments": false,
+  "arrows": false,
+  "booleans": false,
+  "booleans_as_integers": false,
+  "collapse_vars": false,
+  "comparisons": false,
+  "computed_props": false,
+  "conditionals": false,
+  "dead_code": true,
+  "directives": false,
+  "drop_console": false,
+  "drop_debugger": false,
+  "evaluate": false,
+  "expression": false,
+  "hoist_funs": false,
+  "hoist_props": false,
+  "hoist_vars": false,
+  "if_return": true,
+  "join_vars": false,
+  "keep_classnames": false,
+  "keep_fargs": false,
+  "keep_fnames": false,
+  "keep_infinity": false,
+  "loops": false,
+  "negate_iife": false,
+  "properties": false,
+  "reduce_funcs": false,
+  "reduce_vars": false,
+  "side_effects": false,
+  "switches": true,
+  "typeofs": false,
+  "unsafe": false,
+  "unsafe_arrows": false,
+  "unsafe_comps": false,
+  "unsafe_Function": false,
+  "unsafe_math": false,
+  "unsafe_symbols": false,
+  "unsafe_methods": false,
+  "unsafe_proto": false,
+  "unsafe_regexp": false,
+  "unsafe_undefined": false,
+  "unused": true,
+  "const_to_let": false,
+  "pristine_globals": false,
+  "passes": 1
+}

crates/swc_ecma_minifier/tests/fixture/issues/9619/input.js

@@ -0,0 +1,17 @@
+var a = (() => {
+  switch ("production") {
+    case "production":
+      return "expected";
+    default:
+      return "unexpected1";
+  }
+
+  switch ("production") {
+    case "production":
+      return "unexpected2";
+    default:
+      return "unexpected3";
+  }
+})();
+
+console.log(a);

crates/swc_ecma_minifier/tests/fixture/issues/9619/output.js

@@ -0,0 +1,2 @@
+var a = (()=>"expected")();
+console.log(a);